Digitization Quality and the FADGI Guidelines

Digitization promises better access and less physical storage — but only if the resulting images are trustworthy. A blurry, incomplete, or poorly described scan is worse than useless: it can give false confidence while failing as a record. Quality standards are what make a digital surrogate defensible, and in the U.S. the most widely used benchmarks come from FADGI.

What FADGI is

The Federal Agencies Digital Guidelines Initiative (FADGI) is a collaboration among U.S. federal agencies that publishes technical guidelines for digitizing cultural and records materials. Its best-known contribution is a star-rating system (one to four stars) for image quality, with measurable targets for resolution, color accuracy, tone, and other characteristics. Agencies and vendors use FADGI levels to specify and verify digitization quality objectively rather than by eye.

Beyond resolution

Good digitization is about more than dots per inch. A defensible program addresses:

• Resolution and color appropriate to the source material and its use.
• File formats suited to long-term preservation, not just convenience.
• Metadata so each image is identifiable and manageable as a record.
• Quality control to confirm every page was captured, legibly and in order.

NARA has issued standards agencies must meet when digitizing records — particularly permanent records destined for the National Archives.

Why standards enable disposal of originals

The payoff of digitization usually depends on being able to dispose of the paper originals afterward. That is permitted only when the digital version meets the required quality and metadata standards and the disposal is authorized by a retention schedule. Meeting a recognized standard like FADGI is precisely what lets an organization treat the scan as a reliable replacement — and confidently reclaim the space the paper was taking.